### Home > CALC > Chapter 9 > Lesson 9.2.2 > Problem 9-67

9-67.

Solve *f*′(*x*) = 0 to locate the extrema and determine the increasing/decreasing intervals.

Solve *f*''(*x*) = 0 to determine points of inflection and the intervals of concavity.

9-67.

Solve *f*′(*x*) = 0 to locate the extrema and determine the increasing/decreasing intervals.

Solve *f*''(*x*) = 0 to determine points of inflection and the intervals of concavity.